“…The last number found, corresponding to column 2, must either be a 0 or 1, with no fractional part, so this provides a check for errors in the fractional portion of the UBNIN-C value, or in the decoding process. [1], showing the lower triangular matrix in pink, in addition to the symmetrical upper triangular matrix that was used to generate the UBNIN. Arrows show the direction chosen by the authors for reading the numbers, bottom-to-top, followed by left-to-right.…”